Alps Electric Co., Ltd.

Other

Tohoku Magnet Institute Co., Ltd.

Murata Manufacturing Co., Ltd.

Panasonic Corporation

Japan Science and Technology Agency

Tohoku University

Nec Tokin Corporation

Teikoku Piston Ring Co., Ltd.

Alps Alpine Co., Ltd.

Japan Science and Technology Corporation

Research Development Corporation of Japan

Tokin Corporation

Tohoku Techno Arch Co., Ltd.

Nagano Japan Radio Co., Ltd.

Akihiro Makino

Akihisa Inoue

Takashi Hatanai

Naoya Hasegawa

Akinori Kojima

Yutaka Yamamoto

Takao Mizushima

Masamichi Saito

Yasuo Hayakawa

Tsuyoshi Masumoto

Nobuyuki Nishiyama

Noriharu Yodoshi

Kiyonori Suzuki

Toru Takahashi

Eiji Umetsu

Yukio Nishikawa

Yoshito Sasaki

Akiri Urata

Kazuaki Ikarashi

Yukie Nakazawa

Hiroyuki Matsumoto

Mikio Nakashima

Kazuhiro Henmi

Kiyoshi Sato

Toshinori Watanabe

Shoji Yoshida

Shigeyoshi Yoshida

Fumihito Koike

Koichi Mukasa

Akira Takahashi

Hisamichi Kimura

Yoshihiro Kanada

Terutsugu Segawa

Yasuichi Ono

Yutaka Naito

Yoshio Harakawa

Wei Zhang

Nobuhiro Hayashi

Noriyuki Kataoka

Yasunobu Yamada

Tohru Kojima

Makoto Nakazawa

Kouichi Fujita

Katsuaki Hangai

Junichi Murakami

Kiyohito Yamasawa

Teruo Bitoh

Kana Takenaka

Kiyoshi Kobayashi

Junichi Ouchi

Ichiro Tokunaga

Yutaka Shimada

Osamu Kitakami

Takeshi Ogawa

Seiji Kikuchi

Kazuaki Fukamichi

Hiroyuki Wakiwaka

Koji Nakashima

Toshitaka Minamisawa

Takanori Igarashi

Youichi Kimura

Teruyoshi Kubokawa

Yoshitsugu Motoe

Masaharu Sugiyama

Hiroko Uyama

Kim Jek Jun

Mikio Nakajima

Tomio Takase

Ysuo Hayakawa

Akihsia Inoue

Kumiko Ominato

Akinobu Kojima

Oki Yamaguchi

Tadashi Sasaki

Parmanand Sharma

Kazuya Oominato

Tomohito Ishikawa

Shinichi Sasaqawa

Yutaka Naitoh

Bo Bian

Yoshihiko Hirotsu

A soft magnetic powder according to the present disclosure comprises a particle which comprises a plurality of nanosized crystallites and an amorphous phase existing around the crystallites, wherein the crystallites have an average grain diameter of 30 nm or less, and the amorphous phase has an average thickness of 30 nm or less; and wherein when a minor axis of a cross section of the particle is determined as r, an average Fe concentration in the amorphous phase is lower than an average Fe concentration in the crystallites in a region where a depth from a surface of the particle is 0.2 r or more and 0.4 r or less.

Soft magnetic material and method for manufacturing the same

A soft magnetic powder according to the present disclosure comprises a particle having no hollow part as a main component, wherein a number of hollow particle present in a region of 2.5 mm square is 40 or less in a cross section of a molded body obtained by powder-compacting and molding the soft magnetic powder so as to have a volume filling rate of 75% or more and 77% or less (i.e., from 75% to 77%).

Soft magnetic powder

A method for producing a magnetic core includes a processing step of giving a desired shape to a strip made of an alloy composition, a heat-treating step of forming bcc-Fe crystals, and then a stacking step of obtaining a magnetic core having a shape. Here, the alloy composition is Fe&#x2014;B&#x2014;Si&#x2014;P&#x2014;Cu&#x2014;C and has an amorphous phase as a primary phase. In the heat-treating step, the strip is heated up to a temperature higher than a crystallization temperature of the alloy composition at a high heating rate.

Method for producing laminated magnetic core

A magnetic powder is represented by general formula Fe(SiBP), and is produced with a gas atomization method. When the value of a and the value of b in the general formula is represented (a, b), (a, b) is within a predetermined region V. Similarly, (a, c) and (a, d) are within a predetermined region, respectively. Whereby, it is possible to obtain an alloy magnetic powder which has high saturation magnetic flux density, low magnetic loss, and is spherical and easy to handle; and a magnetic core, a variety of coil components, and a motor can be realized by using the magnetic material.

Magnetic powder and production method thereof, magnetic core and production method thereof, coil component and motor

A magnetic powder is represented by general formula FeSiBPCu. 71.0&#x2264;a&#x2264;81.0, 0.14&#x2264;b/c&#x2264;5, 0&#x2264;d&#x2264;14, 0&#x3c;e&#x2264;1.4, d&#x2264;0.8&#x2212;50, e&#x3c;&#x2212;0.1(+d)+10, and a+b+c+d+e=100. A crystallinity is not more than 30% in the case of containing an amorphous phase and a compound phase, and is not more than 60% in the case of not containing a compound phase. The magnetic powder is produced with a gas atomization method. Whereby, it is possible to obtain an alloy magnetic material which has high saturation magnetic flux density and low magnetic loss; and a magnetic core, coil components, and a motor can be realized.

A heat treatment apparatus for a laminated body of amorphous alloy ribbon includes: a lamination jig that holds the laminated body of amorphous alloy ribbon; two heating plates that sandwich the laminated body from upper and lower surfaces in a lamination direction without coming into contact with the lamination jig; and a heating control apparatus that controls a heating temperature of the two heating plates.

Heat treatment apparatus for laminated body of amorphous alloy ribbon and soft magnetic core

A magnetic-plate laminated body includes: a laminated part made up of a plurality of laminated soft magnetic ribbons; first and second metal plates that sandwich the laminated part from upper and lower surfaces in a lamination direction of the laminated part; and a fastening mechanism that penetrates the first and second metal plates and the laminated part and fastening the laminated part by the first and second metal plates.

Magnetic-plate laminated body and motor

Alloy powder of a composition formula FeCoBSiPCuChaving an amorphous phase as a main phase is provided. Parameters satisfy the following conditions: 3.5&#x2264;a&#x2264;4.5 at %, 6&#x2264;b&#x2264;15 at %, 2&#x2264;c&#x2264;11 at %, 3&#x2264;d&#x2264;5 at %, 0.5&#x2264;e&#x2264;1.1 at %, and 0&#x2264;f&#x2264;2 at %. With this composition, the alloy powder has good magnetic characteristics even when it has a large particle diameter such as 90 &#x3bc;m. Therefore, yield thereof is improved.

Alloy powder and magnetic component

An Fe-based nano-crystalline alloy formed from an alloy composition of (FeE)BPCuhaving an amorphous phase as a main phase, wherein 79&#x2266;100-X-Y-Z&#x2266;86 atomic %, 4&#x2266;X&#x2266;9 atomic %, 1&#x2266;Y&#x2266;10 atomic %, and 0.5&#x2266;Z&#x3c;1.2 atomic %, and wherein (FeE) includes Fe and at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Mo, W, Cr, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, Y, N, O and a rare-earth element, wherein a combined total of said at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Mo, W, Cr, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, Y, N, O and a rare-earth element is in an amount of 3 atomic % or less relative to the whole composition.

Fe-based nano-crystalline alloy

For providing a magnetostrictive film that can exhibit high magnetostrictive properties in the vicinity of zero magnetic field and their manufacturing methods, a magnetostrictive film thermal sprayed on an object under test includes a metallic glass film subjected to thermal processing at a temperature lower than the glass transition temperature and not lower than the Curie point, and shows a linearity between the magnetic field and the magnetostriction in at least a part of the magnetic field from &#x2212;15 kA/m to +15 kA/m (both inclusive).

Magnetostrictive film, magnetostrictive element, torque sensor, force sensor, pressure sensor, and manufacturing method therefor

An alloy composition of FeBPCu, where 4&#x2266;X&#x2266;14 atomic %, 0&#x3c;Y&#x2266;10 atomic %, and 0.5&#x2266;Z&#x2266;2 atomic %. This alloy composition has an amorphous phase as a main phase. This alloy composition is used as a starting material and exposed to a heat-treatment so that nanocrystals comprising no more than 25 nm of bccFe can be crystallized. Thus, an Fe-based nano-crystalline alloy having superior magnetic properties can be obtained.

Alloy composition, Fe-based nano-crystalline alloy and forming method of the same

A magnetic recording medium 1 includes a substrate 11; and a metallic glassy layer 12 that is arranged on the substrate 11 and has a plurality of convex portions 12A and concave portions 12B. The metallic glassy layer 12 has a chemical composition represented by any one of the formulae (1) to (3):FePtSiBP(wherein, 20&#x3c;m&#x2266;60 at %, 20&#x3c;n&#x2266;55 at %, 11&#x2266;x&#x3c;19 at %, 0&#x2266;y&#x3c;8 at %, and 0&#x3c;z&#x3c;8 at %)&#x2003;&#x2003;(1);FePt(SiBP)(wherein, 11&#x2266;x&#x3c;19 at %, 0&#x2266;y&#x3c;8 at %, and0 &#x3c;z&#x3c;8 at %)&#x2003;&#x2003;(2); and(FePtSiBP)-M(wherein, 0&#x3c;X&#x2266;6 at %; and M represents an element or a combination of any two or more of the elements selected from Zr, Nb, Ta, Hf, Ti, Mo, W, V, Cr, Mn, Al, Y, Ag,and rare earth elements.)&#x2003;&#x2003;(3).

Metallic glass, magnetic recording medium using the same, and method of manufacturing the magnetic recording medium

An alloy composition of FeBSiPCCu. Parameters meet the following conditions: 79&#x2266;a&#x2266;86 atomic %; 5&#x2266;b&#x2266;13 atomic %; 0&#x2266;c&#x2266;8 atomic %; 1&#x2266;x&#x2266;8 atomic %; 0&#x2266;y&#x2266;5 atomic %, 0.4&#x2266;z&#x2266;1.4 atomic %; and 0.08&#x2266;z/x&#x2266;0.8. Or, parameters meet the following conditions: 81&#x2266;a&#x2266;86 atomic %; 6&#x2266;b&#x2266;10 atomic %; 2&#x2266;c&#x2266;8 atomic %; 2&#x2266;x&#x2266;5 atomic %; 0&#x2266;y&#x2266;4 atomic %; 0.4&#x2266;z&#x2266;1.4 atomic %, and 0.08&#x2266;z/x&#x2266;0.8.

Alloy composition, Fe-based nano-crystalline alloy and forming method of the same and magnetic component

A magnetic recording mediumincludes a substrate; and a metallic glassy layerthat is arranged on the substrateand has a plurality of convex portionsA and concave portionsB. The metallic glassy layerhas a chemical composition represented by any one of the formulae (1) to (3): FePtSiBP(wherein, 20&#x3c;m&#x2266;60 at %, 20&#x3c;n&#x2266;55 at %, 11&#x2266;x&#x3c;19 at %, 0&#x2266;y&#x3c;8 at %, and 0&#x3c;z&#x3c;8 at %) (1); FePt(SiBP)(wherein, 11&#x2266;x&#x3c;19 at %, 0&#x2266;y&#x3c;8 at %, and 0&#x3c;z&#x3c;8 at %) (2); and (FePtSiBP)M(wherein 0&#x3c;X&#x2266;6 at %; and M represents an element or a combination of an two or more of the elements selected from Zr, Nb, Ta, Hf, Ti, Mo, W, V, Cr, Mn, Al, Y, Ag, and rare earth elements.) (3).

A soft magnetic alloy contains P, B, and Cu as essential components. As a preferred example, an Fe-based alloy contains Fe of 70 atomic % or more, B of 5 atomic % to 25 atomic %, Cu of 1.5 atomic % or less (excluding zero), and P of 10 atomic or less (excluding zero).

Soft magnetic alloy, magnetic part using soft magnetic alloy, and method of manufacturing same

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Sendai, Japan

Akihiro Makino